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TeXes Core EC-6: Statistics
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Terms in this set (18)
Mean
the average of a distribution, obtained by adding the scores and then dividing by the number of scores.
Median
the middle score in a distribution; half the scores are above it and half are below it
Mode
the most frequently occurring score(s) in a distribution
Range
the difference between the highest and lowest scores in a distribution
Statistical Experiements
trials of an event that has more than one probability based outcome.
Normal Distribution
a bell-shaped curve, describing the spread of a characteristic throughout a population, graph is symmetric and has no skew
Standard Deviation
average of how far each data point is away from the mean, higher standard deviation indicates higher variability in the data
Categorical Data
data recorded as categories/groups [bar graph, line graph, pie chart]
Quantitative Date
data which is measured and usually expressed numerically [dot plot, stem and leaf plot, box and whisker plot, histogram]
Bar Graph
A graph that uses horizontal or vertical bars to display data, shows comparisons between categories of data.
Double Bar Graph
Compares two sets of categorical data with two bars next to each other.
Line Graph
A graph that uses line segments to show changes that occur over time
Pie Charts
a graph in which a circle is divided into sectors that each represent a portion of the whole.
Dot Plot
a graph that uses dots to show the frequency counts of a group of data.
Stemplot/stem-and-leaf plot
data are separated into a steam and a leaf by place value and organized in the form of a histogram
Histogram
A graph of vertical bars representing the frequency distribution of a set of data.
Boxplot
splits data set into quartiles, middle is 50% from the whiskers. are used with larger sets of data
pictograph
A picture or drawing representing words or ideas
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